Sentences with phrase «risen over the past quarter century»

In 1987, for example, turnout inequality by class was almost non-existent and age - based differences were significantly lower; cleavages in both have steadily risen over the past quarter century.

Not exact matches

As much as the fall of the Berlin Wall or the rise of social media, the astonishing decline in world - wide poverty stands as one of humanity's greatest achievement over the past quarter century.

Over the past quarter century, G20 carbon dioxide emissions had risen by almost 50 percent while per capita emissions had gained by about 18 percent, reflecting population growth, it said.

Thanks in large part to satellite measurements, scientists» skill in measuring how much sea levels are rising on a global scale - currently 0.13 inch (3.4 millimeters) per year - has improved dramatically over the past quarter century.

Over the past quarter - century, both the extent of melting and the length of the melt season on the Greenland ice sheet have been growing, as local temperatures have risen.6 Satellites measure the extent of melting by differentiating between areas of the ice mass that are fully frozen and those with surface meltwater.

You may wonder why the government finds the need to pursue such action since 1) U.S. carbon dioxide emissions have already topped out and have generally been on the decline for the past 7 - 8 years or so (from technological advances in natural gas extraction and a slow economy more so than from already - enacted government regulations and subsidies); 2) greenhouse gases from the rest of the world (primarily driven by China) have been sky - rocketing over the same period, which lessens any impacts that our emissions reduction have); and 3) even in their totality, U.S. carbon dioxide emissions have a negligible influence on local / regional / global climate change (even a immediate and permanent cessation of all our carbon dioxide emissions would likely result in a mitigation of global temperature rise of less than one - quarter of a degree C by the end of the century).