Latest SGI Quarterly - April {Out now}

Renewable energy is defined as energy derived from natural resources that are replenishable, such as sunlight, wind, rain, tides, biomass and geothermal heat. It thus fundamentally differs from fossil fuel-based energy or nuclear energy. The Industrial Revolution was fueled by excessive mining and burning of fossil fuels, causing an undesirably sharp rise in the concentration of carbon dioxide in Earth's atmosphere, which in turn has caused global warming and climate change. The second half of the 20th century saw considerable, incremental efforts toward conservation, the use of clean technology and renewable energy, and environmental protection. Now, renewable energy sources and their attendant technologies hit the headlines on a daily basis as more secure solutions for providing renewable energy are found.

Pollination by hand in China

Photo Credit: Eric Tourneret

In China, in the world's pear capital, it is the farmers who carry out the pollination of the trees: costly and painstaking work that replaces the bees killed by pesticides, Neonicotinoids specifically.

The city of Hanyuan, dressed in the finery of the white blossoms on the pear trees, could make us believe in the eternal China with its red and black brick roofs and the grandeur of its foggy landscapes. But don't let yourself be misled. It was agricultural reform instituted by the "Great Helmsman" that made the city the pear capital of Sichuan at the beginning of the 1980s. Perched at 1600 metres altitude, Hanyuan transformed its rice paddies into orchards. At the time, pears sold for 4 to 5 times the price of rice because China had to feed its population, which had tripled in ten years, going from 400 million to 1.2 billion. Today, with 7% of the world's cultivated land, the country has to feed 22% of the world's population.