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WASHINGTON (Reuters) - Before humans began burning fossil fuels, there was an eons-long balance between carbon dioxide emissions and Earth's ability to absorb them, but now the planet can't keep up, scientists said on Sunday.

The finding, reported in the journal Nature Geoscience, relies on ancient Antarctic ice bubbles that contain air samples going back 610,000 years.

Sydney-based Ecocho founder Tim Macdonald had an idea; build a search engine based on Google and Yahoo technology and use the ad revenue to plant two trees for every 1,000 searches, offsetting tons of carbon dioxide.

Is my sustainability work consonant with the gravity of the climate crisis and the urgency of the ecological challenges we face?

At Southern New Hampshire University (SNHU), as a complement to our work on renewable energy hedges, we are working to transform energy use on campus. One project underway is a system of grid-tied electric vehicles (Vehicle to Grid or V2G) combined with a solar photovoltaic charging system and smart computer control.

Consuming a lot of aspartame may inhibit the ability of enzymes in your brain to function normally, according to a new review by scientists from the University of Pretoria and the University of Limpopo.

The review found that high doses of the sweetener may lead to neurodegeneration. It has also previously been found that aspartame consumption can cause neurological and behavioral disturbances in sensitive individuals.

Dutch ecologist Roxina Soler and her colleagues have discovered that subterranean and aboveground herbivorous insects can communicate with each other by using plants as telephones. Subterranean insects issue chemical warning signals via the leaves of the plant. This way, aboveground insects are alerted that the plant is already ”˜occupied’.