• "Mark Ruffalo, aka the Incredible Hulk, is the natural gas industry's worst nightmare: a serious, committed activist who is determined to use his star power as a superhero in the hottest movie of the moment to draw attention the environmental and public health risks of fracking." - Jeff Goodell Tweet
• "A variety of factors contribute to the price of gasoline in the United States. These factors include worldwide supply, demand and competition for crude oil, taxes, regional differences in access to gasoline supplies and environmental regulations." - Gary Miller Tweet
• "My entry into the environmental arena was through the issue that so dramatically - and destructively - demonstrates the link between science and social action: nuclear weapons." - Barry Commoner Tweet
• "Civilization has given us enormous successes: going to the moon, technology. But then this is the civilisation that took us to debt, environmental crisis, every single crisis. We need a civilization where we say goodbye to these things." - Muhammad Yunus Tweet
• "Population, when unchecked, goes on doubling itself every 25 years or increases in a geometrical ratio." - Thomas Malthus Tweet
• "We assume that everything's becoming more efficient, and in an immediate sense that's true our lives are better in many ways. But that improvement has been gained through a massively inefficient use of natural resources." - Paul Hawken Tweet
• "We don't have to sacrifice a strong economy for a healthy environment." - Dennis Weaver Tweet
• "But my point is that you design something in the end that precludes any unhealthy trading practices that are not going to serve your environmental or your economic objectives but now is not the time to do it." - John Anderson Tweet
• "We won't have a society if we destroy the environment." - Margaret Mead Tweet
• "Beyond reducing individual use, one of our top priorities must be to move from fossil fuels to energy that has fewer detrimental effects on water supplies and fewer environmental impacts overall." - David Suzuki Tweet