Climate News Network: Greenhouse gas emissions from industry and power generation have begun to trigger ocean changes that will impose huge costs to the poorest people on the planet. Only in the polar regions would there be any increase in productivity or in oxygen levels. Nowhere would there be any cooling. These changes are likely to cascade through marine ecosystems and habitats to the deep ocean itself, and to affect humans along the way, according to a report published this month in the journal Public Library of...