High gas prices in US cut driving for eighth month >>Source: Reuters
Americans scaled back their driving during June by almost 5% in response to soaring fuel costs, the US government has said - a day after announcing the biggest six-month drop in US petroleum demand in 26 years.
Water's the limit for tall trees >>Source: BBC
Douglas firs, one of the tallest tree species, are unlikely to surpass 138m (453ft) in height, a study suggests, as there is a limit on how high the giant trees are able to pull water up their trunks to supply upper branches.
Smog-related deaths set to soar in Canada >>Source: Reuters
Smog-related deaths are set to soar to more than 700,000 in Canada over the next two decades, the Canadian Medical Association has said.
Climate cropland changes 'raising temperatures' in East Africa >>Source: SciDevNet
Research predicts that vast amounts of land in East Africa will be converted from grasslands to ploughed fields over the next 40 years, as wetter conditions caused by climate change attract crop farmers to grazing grounds.
Ecuador says could help settle Chevron suit >>Source: Reuters
Ecuador is willing to mediate a settlement between Chevron Corp and 30,000 Amazon jungle dwellers suing the oil company for up to $16bn (£8.6bn) in environmental damages, the country's top attorney has said.
