Keystone predators, such as wolves, control prey numbers and behavior. On the lookout for wolves, wary elk eat more sparingly. This releases shrubs and saplings from browsing pressure, improves habitat for other species, and increases biodiversity. These cascading effects are based on powerful evolutionary relationships.
We are at a crossroads. The Republican budget seeks to destroy the legislative legacy of 1965 that made great differences in the lives of so many ordinary people. Democrats must defend our proud legacy and fight against the efforts of those who seek to devalue the worth of hardworking Americans.
Once again, Goldman Prize awardees embody how single, determined individuals across the world can mobilize enough groundswell to conquer industrial Goliaths. Hailing from diverse backgrounds, these 2015 superheroes form a fountain of inspiration for all of us, and their weblinks show how we can act.
As a generation that is facing the reality of a changing climate in their own lifetimes, young people are the most vulnerable yet potentially also the best placed (and most motivated) to generate an ambitious societal response that will avoid the most dangerous risks of climate change.
No age is too young to educate and empower children about our environment. In fact, the earlier, the better.
Only 4 percent of Americans hear people they know talk about climate change on a weekly basis. Is it any wonder that Congress is not treating climate action as a priority?
Why all the silence about climate change? Why isn't this topic filling our conversations, the way a tsunami would, or a major earthquake? I ask again, why are not more people crying out? Let me suggest some of the reasons.
We must not sacrifice our bedrock environmental, public-health, and climate safeguards as the price of a free-trade agreement. Unfortunately, what we have seen from the two pending trade agreements raises serious concerns that these standards could be weakened through the various provisions of these trade agreements.
Today, the Earth got a little hotter, and a little more crowded. ...
How are members of Congress celebrating Earth Day this year? Planting trees? Recycling? Passing legislation that will further protect our air, land, water and wildlife for generations? Guess again.
Apparently, a set of practices and principles designed to ensure that human civilization has a future on this planet is akin to religious zealotry.
The Earth is amazing. And when you look at the view from space you see that the whole Earth is your home, our home. You see that what happens on the other side of the planet matters.
The G7 Foreign Ministers can take a leading role in avoiding the increased weakening and even total collapse of states and societies threatened by fragility challenges. As evidence demonstrates, one does not need to reinvent the wheel for this.
The deniers can blow all the smoke they want, but, as you watch this spectacle unfold, history, pictures, science, data and nature do not lie.
Current multi-year droughts in the western U.S. and elsewhere force policy leaders to recognize that the challenge is not just for poor people living in faraway places. Challenges of food and water security are here now. Our leaders are awakening to the fact that, even if scientists cannot attribute current drought entirely to human-caused climate change, this is what climate change looks like -- and we don't like that look.
Congress should amend the President's free tuition idea to create the civilian equivalent of a GI Bill for young adults who engage in 1-3 years of national service. That single change would turn the President's proposal from a college giveaway to an opportunity that serves both the individual and the country.