Last chance to stop plant catastrophe. Time is running out if we are going to prevent climate change leading to a mass extinction of plants, an international groups of botanists warned this week. [News Source]

Plants’ wilting point linked to brutal heat waves. Computer models have predicted for years that more common and more brutal heat waves, like those that have struck Europe in recent years, are a probable consequence of global warming. [News Source]

Nitrous oxide - no laughing matter for forests. Climate change could cause forests in Europe to spew out more and more nitrous oxide, aka laughing gas, a potent contributor to global warming. [News Source]

Climate-change critic sues paper, school, professor. The skeptic at the centre of the heated debate about climate change that has been taking place in Canadian newspapers is moving the dispute to the courts. [News Source]

A kinder, gentler El Niño predicted for this winter. El Niño, the weather phenomenon often associated with endless rainfall, massive flooding and destructive mudslides in California, has started to develop and should stick around until early next year. [News Source]

Study acquits sun of climate change, blames humans (Reuters via Yahoo! News) The sun's energy output has barely varied over the past 1,000 years, raising chances that global warming has human rather than celestial causes, a study showed on Wednesday. [News Source]

Summer was the second warmest ever. This summer has been the second warmest on record in Canada, with almost the entire country basking in above-normal temperatures. [News Source]

Changes in solar brightness too weak to explain global warming. Changes in the Sun's brightness over the past millennium have had only a small effect on Earth's climate. [News Source]

Climate change seen pushing plants to the brink. Thousands of plant species are being pushed to the brink of extinction by global warming, and those already at the extremes are in the greatest danger, a leading botanist said on Tuesday. [News Source]

English country gardens under attack from global warming. Environment Minister Ian Pearson told the estimated 27-million strong green-fingered army, some 40 percent of the population, that they had to face up to the challenges of climate change if they wanted to keep their cherished gardens looking splendid. [News Source]

Mass. governor resolves not to rejoin CO2 pact. Massachusetts Gov. Mitt Romney will not rejoin a regional pact to regulate greenhouse gases despite the urging of the state's congressional delegation. [News Source]