We, the undersigned scientists, writers, artists and concerned citizens, call upon North American governments to preserve one of the the most extraordinary and iconic creatures on the planet.
MEXICO CITY -- Migratory monarch butterflies, which flock to the mountains of central Mexico every winter, are severely endangered because of herbicides, extreme weather and climate change. Now, a Mexican mining company with a terrible environmental record plans to reopen a mine in the heart of a protected monarch reserve.
Today, it is mostly silence that surrounds the abandoned buildings that stand as testimony to the hasty departure.
BERLIN -- As world leaders gather in New York for the Paris climate agreement signing ceremony, they ought to remember that now is the time to finally put some muscle behind their promises.
CAPE TOWN, South Africa -- As I sit in traffic during Cape Town's busy rush hour, it's difficult to imagine that running beneath this city of approximately 3.75 million are hundreds of kilometers of underground brick tunnels, tunnels that transport millions of liters of fresh spring water from Table Mountain directly out into the sea. The mountains that overlook this beautiful city were once its lifeblood, supplying the entire population with water.
Concerns over China's economic and environmental crises should not be dismissed quickly. But they also present an opportunity. China's modern history could very well be that of an environmental revolution.
Over the next few days, leaders from cities, local governments and other organizations around the world will gather in Lyon, France. It is an important step toward COP21, the UN conference on climate change that will happen in Paris in December. The bold actions taken not only by local leaders but also by all the range of non-state actors to reduce greenhouse gases place them at the forefront of the fight against climate change.
STOCKHOLM -- In 2009, my colleagues and I identified nine planetary boundaries relating to areas like climate, biodiversity, nitrogen and phosphorus use and deforestation that, if respected, would enable us to preserve -- or, at least avoid disrupting further -- Holocene conditions. When we updated our analysis earlier this year, we concluded that we have already violated four of the nine boundaries.
SEOUL -- Cities make up about two percent of our planet's surface, yet the number of urban dwellers accounts for more than half of the world's population. Such tremendous growth and density have presented its fair share of challenges, namely that cities are responsible for 70 to 80 percent of global greenhouse gas emissions, much of which is due to buildings, cars and other urban environments.
Cheaper and cleaner than oil -- and seemingly abundant in supply -- shale gas was intended to be our "bridge" fuel to a bright future of renewable energy. But a clear look at the costs involved reveals that shale is a teetering bridge leading to an even higher-cost future.
Given the difficulty in achieving a breakthrough in any of the major problem areas, why is Obama going to India? What does he hope to achieve? I think the primary objective is to reinforce the strategic nature of the relationship by finding ways to enlarge the scope for joint action that are not dependent on what happens at the transactional end.
The main culprit for this precipitous decline is no longer logging in the reserve (although that still takes place) but the huge increase in land planted with genetically modified, herbicide resistant soybean and corn crops (93 percent of total soybean acreage and 85 percent of corn acreage in 2013) in the U.S. Corn Belt.
Are we just another part of nature, doing what nature does: reproducing to the limits of environmental capacity, after which we will suffer a population crash?
After two weeks of hectic parleys, more than 190 countries at the Lima climate change talks agreed on a plan to fight global warming that would, for the first time, commit all countries to cutting their greenhouse gas emissions. There is a significant departure from one of the defining principles of the last 20 years of climate talks: wealthy countries would not carry the burden of cutting carbon dioxide emissions.
Around 400 million Indians still do not have access to electricity. With electrification and development, our emissions are certainly set to rise. It would be disastrous for India if the National Democratic Alliance government under Prime Minister Narendra Modi surrenders to the demands of developed nations to cut down emissions.
By demonstrating their willingness to work together, the leaders of the United States and China are opening a new chapter in global climate negotiations. This bold leadership comes at a critical time for our planet when the costs of carbon pollution affect our lives more and more each day.