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Costa Rica has reached an environmental milestone by using only renewable energy to generate power for at least the first 75 days of the year, a record for any country

Costa Rica's new president has announced a plan to ban fossil fuels and become the first fully decarbonised country in the world.

Costa Rica's left-wing opposition looks set to win next month's national elections, and party leaders say one of their first moves would be to cancel the country's pledge to achieve carbon neutrality by 2021. That goal, which is markedly more ambitious than any other country's carbon-reduction target, is no longer attainable, officials say. "We don't think it would be possible to reach carbon neutrality by 2021, because the most important tasks to reduce emissions in the country are yet to be done," said opposition environmental adviser Patricia Madrigal.

Global trade has made it easier to buy things. But our consumption habits often fuel threats to biodiversity - such as deforestation, overhunting and overfishing - thousands of miles away. Now, scientists have mapped how major consuming countries drive threats to endangered species elsewhere. Such maps could be useful for finding the most efficient ways to protect critical areas important for biodiversity, the researchers suggest in a new study published in Nature Ecology & Evolution. For example, the maps show that commodities used in the United States and the European Union exert several threats on marine species in Southeast Asia, mainly due to overfishing, pollution and aquaculture. The U.S. also exerts pressure on hotspots off the Caribbean coast of Costa Rica and Nicaragua, and at the mouth of the Orinoco around Trinidad and Tobago. European Union's impacts extend to the islands around Madagascar: Réunion, Mauritius and the Seychelles. The maps also revealed some unexpected linkages. For instance, the impact of U.S. consumption in Brazil appears to be much greater in southern Brazil (in the Brazilian Highlands where agriculture and grazing are extensive) than inside the Amazon basin, which receives a larger chunk of the attention. The U.S. also has high biodiversity footprint in southern Spain and Portugal, due to their impacts on threatened fish and bird species. These countries are rarely perceived as threat hotspots.