Food dumps are a rising source of methane, a far more powerful greenhouse gas than carbon dioxide.
Planes are not only a rising source of greenhouse gases, but also contribute through the vapour they produce, which – coming at such high altitudes – has a greater warming effect.
But the question of exactly who owns the electronic rights to such older titles is in dispute, making it a rising source of conflict in one of the publishing industry's last remaining areas of growth.
In the weeks ahead, Obama is expected to roll out long-awaited rules to cut methane emissions from oil and gas wells and landfills, a rising source of climate pollution.
They said Australia was not moving fast to meet some 2018 run-off reduction targets, and was not recording a rising source of run-off pollution from land clearing, which has recently surged.
This discrepancy has been a rising source of concern for many Facebook users and developers who have unwittingly informed their friends of activites they had ostensibly made private.
After reading Lakhani's paper describing the rising source of open software communities, von Hippel convinced Lakhani to drop his engineering aspirations and become a scholar of innovation.
And then there is China, a rising source of alarm in the West even at a time of slower economic growth than in the recent past.
Consumers are also using the Internet as a rising source for artwork.
Using a combination of satellite observations and chemical transport modeling, researchers found that two rising sources of ozone offset what should have been a reduction.
