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The average surface temperature of earth has increased more than 1 degree Fahrenheit since 1900 and the rate of warming has been nearly three times the century-long average since 1970. Almost all experts studying the recent climate history of the earth agree now that human activities, mainly the release of heat-trapping gases from smokestacks, tailpipes, and burning forests, are probably the dominant force driving the trend.

Predator plants may cut back on flies if they can access key nutrients elsewhere, according to research. Scientists studying carnivorous sundew plants in Swedish bogs found that nitrogen deposition from rain reduced how many insects the plants trapped. Pollution from transport and industry causes nitrogen-rich rain, meaning more reaches the ground in some areas.

usa.gov