We cannot achieve collective goods acting individually

The Observer - Public goods can’t be based on solo actions: "Given a choice, the average person prefers a free-ride, meaning incurring no cost, in enjoying public goods and services. This is because most public goods have what economists call ‘jointness of supply,’ meaning consumption or use by one member of the public does not diminish the supply of the same good or service to others."

Very good. But all public goods are not the same. The subsidy of roads enables climate change and is a free gift to oil industry. In addition, the more individuals use a road, the worse it is for the whole people. Whereas, the more people use public transit, the more the return on the investment, and the less donation to climate change.

Coal-Burning in the U.S. and Europe Caused a Massive African Drought

Olga Khazan - The Atlantic: "New research from the University of Washington shows that air pollution from the Northern Hemisphere indirectly caused reduced rainfall over Africa's largely arid Sahel region, causing Lake Chad, a major local water source, to dry up, and leading to widespread crop failures."

'via Blog this'

Climate change impacting food supply in Ghana

Times Of India: "He said evidence of climate change in Ghana was that the mean annual temperature had increased by one degree celsius since 1960, on an average rate of 0.21 degree Ccelsius per decade.
...
Adu-Dapaah said the impact of climate change was increasingly becoming severe and that long-term projections indicated crop yields could fall by up to 50 per cent by 2020 and net revenues from crops could drop by as much as 90 per cent by 2100."