Both the United States and the world economy have already reached - and surpassed - their sustainable physical limits. Ground water is being drawn down, soils eroded, forests cut faster than they grow, fish caught faster than they reproduce, non-renewable fossil fuels burnt without developing substitutes.
City farming is not only possible, it is the very definition of the kind of meaningful, sustainable innovation we will need to meet the grand challenges of the 21st century: climate change; population growth; ageing population; urbanization; rising demand for energy, food and water; poverty; and access to healthcare.
Nearly half of the American population is eagerly anticipating the end of the world. This dewy-eyed nihilism provides absolutely no incentive to build a sustainable civilization. Many of these people are lunatics, but they are not the lunatic fringe.
Promoting the use of sustainable and renewable rainforest products can help to stop rainforest devastation. The rainforests are much more valuable alive than cut or burned, providing a steady supply of medicinal plants, fruits, nuts and oils.
I firmly believe that we can have a healthy environment and a sustainable timber industry.
Investing in women's lives is an investment in sustainable development, in human rights, in future generations - and consequently in our own long-term national interests.
With the continued support of citizens who refuse to accept inaction at the expense of future generations, we will lead the world toward a sustainable future.
Fuel cells create a better automobile that's 50 percent more energy-efficient overall and sustainable from energy and safety perspectives.
We can no longer continue with a status quo energy policy. We must create sustainable clean energy jobs and leave the planet to our children and grandchildren in better shape than we found it.
I have said repeatedly that the way to sustainable growth is to bring down inflation to much more reasonable levels.
It's not about the pace, it's about the direction we've set. The pace is of course a function of many factors, including the magnitude of the supply shock. But what's probably more important is the probability of the supply shock translating into sustainable embedded inflation.
In the eyes of many people, giving doesn't count unless it's completely selfless. In reality, though, giving isn't sustainable when it's completely selfless.
Unilever, Nestle and SAB Miller are all taking a long-term approach to investing in sustainable resource consumption. Each is driving through better resource management, which is expected to yield positive returns in the future.
More and more businesses are seeing the potential of a more sustainable business model, driven both by the firm belief that business can be a force for good and by the realization that the cost of inaction often exceeds the cost of action - notably when it comes to the growing threat of climate change and water scarcity.
The key to truly rebuilding our central city on a vital and sustainable foundation is people.
When resources are degraded, we start competing for them, whether it is at the local level in Kenya, where we had tribal clashes over land and water, or at the global level, where we are fighting over water, oil, and minerals. So one way to promote peace is to promote sustainable management and equitable distribution of resources.
Global markets must be balanced by global values such as respect for human rights and international law, democracy, security and sustainable economic and environmental development.
All schools should teach children basic cooking skills. Every school should be able to buy sustainable, good quality food wherever possible from local sources. Every school should include food-growing in the curriculum. For some, that will mean twinning with willing farms. For others, it will mean literally building their own small farms.
It's surreal to think that I own this beautiful island. It doesn't feel like anyone can own Lanai. What it feels like to me is this really cool 21st-century engineering project, where I get to work with the people of Lanai to create a prosperous and sustainable Eden in the Pacific.
Building sustainable cities - and a sustainable future - will need open dialogue among all branches of national, regional and local government. And it will need the engagement of all stakeholders - including the private sector and civil society, and especially the poor and marginalized.
Healthcare continues to move outside the hospital and into our homes and everyday lives. With leading doctors and psychologists, for example, we've developed personal health programs designed around patients to catalyze sustainable behavioural change.
I learned how to cook by making soups, so I was thinking of how to make the most eco-friendly and green way to make soup. Obviously, using water and vegetables from your garden is the most sustainable way.
The Prime Minister of India, at a meeting that I co-chaired a few months ago, stated that any development that is not sustainable is not development.
The only investable idea I have real confidence in is farming and forestry. My family owns some forest, and now we're closing on a farm. Make the farming more sustainable and the forestry more sustainable, and everyone benefits.
At the end of the 1990s, we decided we should invest our best efforts to work in a sustainable way with the ingredients that the Amazon produces.
Engaging in social business is beneficial to a company because it leverages on business competencies to address social issues, involves one-time investment with sustainable results, and produces other positive effects such as employee motivation and improved organizational culture.
I believe that, if managed well, the Fourth Industrial Revolution can bring a new cultural renaissance, which will make us feel part of something much larger than ourselves: a true global civilization. I believe the changes that will sweep through society can provide a more inclusive, sustainable and harmonious society. But it will not come easily.
I think all of us who have been in Afghanistan on the ground multiple times know that what we're doing there on the ground is just not sustainable.
If we're going to see sustainable results from all the other investments we're making in education, we need to build leadership capacity in each and every country.
During my nearly five years as director-general of WHO, high-level policymakers have increasingly recognized that health is central to sustainable development.
I really do encourage other manufacturers to bring electric cars to market. It's a good thing, and they need to bring it to market and keep iterating and improving and make better and better electric cars, and that's what going to result in humanity achieving a sustainable transport future. I wish it was growing faster than it is.
Kevin Systrom of Instagram used to work for us as a consultant in the early days of Mint. I knew him a long time ago. Maybe I could have gotten in there. But with photo sharing, I don't know if there's an obvious business model. I don't think there's a competitive, sustainable advantage.
To ensure stable and sustainable economic growth, world leaders must re-examine the international rules of the monetary game, with advanced and emerging economies alike adopting more mutually beneficial monetary policies.
What I would like to do is to leave behind a sustainable entity of a set of companies that operate in an exemplary manner in terms of ethics, values and continue what our ancestors left behind.
We don't go into a market without a chance of a 40 percent share and sustainable differentiation. We wouldn't get into wiring oil rigs if we didn't believe we could get 40 percent.
Only when the oil and gas industry has taken full account of, and responsibility for, the impacts of exploring for and extracting fossil fuels can we engage in a serious and worthy evaluation of whether fracking can indeed provide a bridge to a sustainable energy future.
