Michael Backman in his latest Age column writes about the issue of population and its connection to greenhouse gases.
WHAT is the ultimate cause of greenhouse gases? Excessive reliance on cars? Coal-fired power stations? Clear-felling forests? The answer is none of these. The ultimate cause is people and population growth.
Having one child with your partner instead of two or more is the biggest contribution to reducing greenhouse gases you can make. Have one child instead of two and you will be directly responsible for cutting your family’s greenhouse gas emissions by about 50% in the next generation.
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Determining which countries have been responsible when it comes to population growth generates a different picture when it comes to developing countries. China is a big and growing greenhouse gas emitter. But it has one of the lowest population growth rates in the region due to the success of its one-child policy and also due to its rising wealth levels — richer people tend to have fewer children.India, on the other hand, is not yet as big a gas emitter as China. Gas emissions per head are about three times less — but its population is growing much faster than China’s. Its population will overtake China’s in the 2030s, when both countries can be expected to have populations of about 1.5 billion. But South Asia, taken as a whole, is already the clear winner in the population stakes. Had partition not taken place in 1947, then India would have overtaken China for the No. 1 spot years ago. The combined population of pre-partition India today (India, Pakistan and Bangladesh) is 1.4 billion, compared with China’s population of 1.3 billion.
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Indeed, the population of pre-partition India is expected to rise by another 900 million people in the first half of this century. Changing to energy-saving light bulbs will be a drop in the ocean compared with this