Overpopulation
How many people can the earth support? Dr. Christopher Tucker raises this question after pointing out that between 1970 and 2017, human population more than doubled, going from 3.7 billion to 7.5 billion. Tucker’s book title provides his answer: A Planet of Three Billion.

What, collectively, do we do with the sickening knowledge that air pollution takes more lives the world over than this virus?

Dilemmas

How does ‘nature’ figure in the way we meet the threat of Covid-19, this virus that is upsetting human life across the world?

By the time this letter goes out it may have become clear whether a tipping point has occurred in the global spread of the coronavirus.