Sentences with phrase «lasting ecological effects»

Not exact matches

Those die - offs, which occurred about 252 million years ago, killed off more than 90 % of all species on Earth, and their ecological effects were long - lasting.

The researchers looked at the pattern of extinctions for 177 species of mammals weighing 10 kilograms or more between 132,000 years ago (the height of the next - to - last ice age to strike the Northern Hemisphere) and 1000 years ago (a time at which the ecological effects of human exploration and expansion became unquestionable).

The reality is that because of the extraordinary speed at which changes are happening (this year's storms, fires, droughts, heat waves, ecological disruptions and other effects compared to last year's or the year before, for example) the speed at which we have to act is extraordinary, too.

For more information on the effects of last year's spill and to further consider what is happening in the Gulf today, watch this 4 minute video on the science of last year's spill, where one year after the largest oil spill in the history of the Gulf of Mexico, scientists are trying to determine the long - term ecological effects.