Trump puts tariffs on Canada, Mexico and China, spurring trade war as North American allies respond
President Donald Trump has signed an order to impose stiff tariffs on imports from Mexico, Canada and China, drawing swift retaliation from the U.S.’s North American neighbors in an emerging trade war ...
The oldest evidence for lead pollution comes from ancient Greece
Researchers have found the oldest known evidence of lead pollution dating to around 5,200 years ago in ancient Greece ...