In many developing countries, demand growth is a bigger source of increasing water stress than changes in climate, but climate change may exacerbate that stress.
With the world's largest population and a rising craving for meat, China will be one of the biggest sources of increased demand.
The biggest source of optimism among opponents is the increasing belief that the polling on which Trump draws his confidence is profoundly flawed.
During his first two terms, Mr. Pataki was able to dramatically cut personal income tax rates, the biggest source of state revenue, and still greatly increase spending, because the boom on Wall Street flooded state coffers with revenue.
1253 and introduced last Wednesday, sets an ambitious timeline for cutting emissions from buildings of more than 25,000 square feet ― the city's biggest source of carbon pollution ― starting in 2022 and increasing steadily until meeting a 40percentt reduction by 2030.
Though currencies normally rise when interest rates are increased, the euro's biggest source of weakness is Europe's slower economic growth compared with that of the United States.
Since the end of 2000, housing has been the biggest source of spending growth in the economy, both directly, through increased homebuilding, and indirectly, through the so-called "wealth effect".
What's more, with Greece neighboring Albania, the biggest source of Islamic State recruits in the Balkans, investigators warn that the passage of militants through this country could increase.
Last week those fears increased with claims that British startups will no longer have access to their single biggest source of investment funding.
Wilkins said the growing superannuation pool and increasing house prices meant superannuation balance was on track to overtake the family home as the biggest source of wealth by the middle of next decade.
