Christian Schwägerl

Insect populations are declining dramatically in many parts of the world, recent studies show. Researchers say various factors, from monoculture farming to habitat loss, are to blame for the plight of insects, which are essential to agriculture and ecosystems.

With the recent opening of a “bike highway,” Germany is taking the lead in Europe by starting to build a network of wide, dedicated bicycle thoroughfares designed to lure increasing numbers of commuters out of their cars and onto two wheels.

A recent battle over imposing a “climate fee” on coal-fired power plants highlights Germany’s continuing paradox: Even as the nation aspires to be a renewable energy leader, it is exploiting its vast reserves of dirty brown coal.

In Germany, the Netherlands, Denmark and other countries, European governments are beginning to push farmers, industry, and municipalities to cut back on fertilizers and other sources of nitrogen that are causing serious environmental harm.

In Germany’s capital — and in cities as diverse as Hong Kong and Chicago — raising bees on rooftops and in small gardens has become increasingly popular, as urban beekeepers find they can reconnect with nature and maybe even make a profit.

The disaster at the Fukushima plant in Japan convinced German Chancellor Angela Merkel that nuclear power would never again be a viable option for her country. Now Merkel has embarked on the world’s most ambitious plan to power an industrial economy on renewable sources of energy.