The first plants to appear on earth 470 million years ago triggered a series of ice ages by causing a reduction in atmospheric carbon, British researchers said. Scientists say the first plants to grow on land, the ancestors of mosses that grow today, had a dramatic impact on the global carbon cycle and the world’s…
The upsurge in droughts is one of the main consequences of climate change, and affects crops in particular. However, Anabel Robredo, a biologist at the University of the Basque Country, has confirmed that in the case of barley at least, climate change itself is providing it with self-defense mechanisms to tackle a lack of water….
“Global warming” and “climate change” succinctly describe a complicated phenomenon, and in just a few decades they have become common descriptors. But while global warming would be bad for the Earth as a whole, the accumulation of greenhouse gases in the atmosphere would affect different areas in different ways, and local climate change is what…
Add methane emissions to the growing list of environmental risks posed by fracking. Opposition to the hydraulic fracturing of deep shales to release natural gas rose sharply last year over worries that the large volumes of chemical-laden water used in the operations could contaminate drinking water. Then, in early January, earthquakes in Ohio were blamed…
At the end of the Cretaceous period some 65 million years ago, an asteroid slammed into Mexico’s Yucatan Peninsula, causing severe but selective extinction. While that is widely accepted, it has remained unclear exactly what the mechanisms were that caused extinction of ocean-dwelling organisms. Proposed explanations include global darkness due to blocking of sunlight with…
The Amazon rainforest is in flux, thanks to agricultural expansion and climate change. In other words, humans have “become important agents of disturbance in the Amazon Basin,” as an international consortium of scientists wrote in a review of the state of the science on the world’s largest rainforest published in the journal Nature. The dry…
Flu pandemics have been linked to fluctuations in climate, and new research connects the world’s four most recent pandemics to the cyclical cooling of the Pacific Ocean near the equator. The connection? Changes in ocean temperature affect migrating birds, which are major contributors to the spread and mixing of flu viruses. An earlier study had…
A national organization best known for its defense of teaching evolution has added climate change to its agenda in a move that highlights a brewing controversy inside the classroom. Across the country, teachers and schools boards are being pressured to teach that the science of climate change is controversial when, in fact, it is not,…
A flash point has emerged in American science education that echoes the battle over evolution, as scientists and educators report mounting resistance to the study of man-made climate change in middle and high schools. Although scientific evidence increasingly shows that fossil fuel consumption has caused the climate to change rapidly, the issue has grown so…
Simple, inexpensive measures to cut emissions of two common pollutants will slow global warming, save millions of lives and boost crop production around the world, an international team of scientists. The climate-change debate has centered on carbon dioxide, a gas that wafts in the atmosphere for decades, trapping heat. But in recent years, scienti have…