Faced with the threat that Asian carp could enter the Great Lakes, Michigan is turning to the public for new ideas and plans to offer a prize to whoever comes up with a way to stop the voracious fish.
Europe's automakers face huge questions: the impact of Britain's decision to leave the European Union, President Donald Trump's proposed border tax on imports, the uncertain prospects for electric vehicles.
Visitors arriving at the Philadelphia Flower Show this year will feel as if they're stepping into the endless flower fields of Holland.
Sending tourists for a trip around the moon is the latest big idea launched by Elon Musk, a Silicon Valley star known for turning his passions into visionary enterprises.
Global carmakers, stung by emissions scandals, are racing to hunt down every gram of harmful CO2 spewed out on the roads as tougher pollution rules kick in.
In a wildlife sanctuary in southern Kenya the relentless sun has bleached savannah grasses and dried up rivers, turning water holes first into muddy pits and now, dust bowls.
US authorities are temporarily suspending the speedy, premium processing of a visa which is often used by tech firms to recruit foreign skilled workers.
Chinese Premier Li Keqiang pledged Sunday to make the country's smoggy skies blue again and "work faster" to address pollution caused by the burning of coal for heat and electricity.