Sentences with phrase «effect over the past couple decades»

The United States has wasted well over $ 60 billion «cramming» technology in schools in this way to little effect over the past couple decades — and predictably so, according to our research.

Not exact matches

Scientists have observed the CO2 fertilization effect in natural ecosystems, including in a series of trials conducted over the past couple decades in outdoor forest plots.

Over the past couple of decades, scientists have taken an interest in examining the effects of spirituality on health.

A classic example of «belaboring the obvious», but the important thing to remember is: It makes absolutely no difference whether you (and I) are right about the «fitness for use» of the global temperature data base, A cursory examination of the actions of various Western governments over the past couple of decades, and recent US policies implemented over the past few years, up until the Social Cost of Carbon regulations now coming into effect, will show that we are having a strictly academic discussion.