GREENLAND HEADING BACK TO GREEN

Modelling of why Greenland stopped being green and became covered with ice indicates that it was the drop three million years ago in the global concentration of carbon-dioxide in the atmosphere from high to pre-industrial levels, reports ScienceDaily.

The present level is now approaching those ancient levels.

No wonder Arctic ice-coverage is on the verge of another all-time low.

This BBC News report says the Arctic is passing through a tipping-point.

OCEAN ACIDIFICATION HAMPERS REPRODUCTION

As this ScienceDaily article warns, the rising acidification of the ocean looks likely to have a major impact on the ability of marine animals to reproduce.

The oceans are already 25% more acid than they were at the start of the industrial revolution and look to be heading towards 300% by 2100. Sperm do not function as well in a more acid environment.

ARTIFICIAL PHOTOSYNTHESIS BREAKTHROUGH FOR HYDROGEN

A breakthrough in creating artificial photosynthesis by mimicking nature looks as if it has the potential to usher in a low-cost hydrogen age, reports ScienceDaily.

SLIME ARISING TO KILL THE OCEANS

ScienceDaily reports that human activities are cumulatively driving the health of the world's oceans down a death spiral that only prompt action can reverse.