there is a direct and powerful correlation between the rise of the human population and the rise of CO2 in Earth’s atmosphere during the past few decades.
We will find it increasingly difficult to feed and shelter increasing numbers of humans across our planet
Growing forests remove CO2 from the atmosphere, mitigating the global warming problem brought on by fossil fuel combustion.
Some types of food can be grown more efficiently overseas and shipped to the point of use, with less overall energy use.
Measures of Earthshine suggest that about 30% of the Sunlight that the Earth receives is reflected back to space.
Short of eating endangered species, eating beef is probably the worst choice you can make vis-à-vis sustainability of the human enterprise on the planet
We need to think of leaves as a resource and not a waste product.
As long as the human population on Earth is growing, nothing we are doing is particularly sustainable
The current decline in sea ice appears unprecedented during the past 1450 years, and it is likely that the Arctic has not been ice-free in the past 2,000,000 years.
The history of lead pollution is the opening chapter in the history of human impacts on global biogeochemistry.
