It returned, counterintuitively, while the population increased: Massachusetts, the third most densely populated state, is on the Top 10 list of most forested states.
Since 2000, national water resources have declined, while the population grows and urbanisation explodes.
While the population keeps growing, the roads and facilities remain the same.
While the population doubled in the last 50 years, water use tripled.
While the population is growing by 2.36percentt a year, he said, food production is growing by only 1.9percentt.
Operating expenses have more than doubled in the past decade while the population has remained stablilized at about 8 million.
Finally, we need to find a way to transform global food production while the population continues to rise.
"We have 180 doctors graduating every year, but the numbers have been stable while the population has tripled.
While the population is estimated to be about 25,000 at the most, observations by biologists show a decline.
Fewer than 7,000 wild dogs remain, while the population of Grévy's zebra is below 3,000.
While the population has since more than doubled, the place retains a small-town intimacy.
