US and China to sign Paris climate deal in April. Countries responsible for 40% of worldâs carbon emissions to formally approve historic pact and pursue efforts to limit warming to 1.5C, reports Climate Home. Done deal! US President Barack Obama with President Xi Jinping of China at the Paris climate conference in Le Bourget, France. The two leaders will soon meet in Washington DC. China and the United States, the worldâs two leading carbon polluters, said on Thursday they planned to formally join the Paris climate agreement in 2016.
A: According to the Institute for Marine Mammal studies, dolphins can generally hold their breath for as long as  10 minutes. They normally breathe about four to five times per minute.
In order for a dolphin to dive into the water without worrying about inhaling water when it is submerged the muscles surrounding the dolphins blowhole contract to prevent the dolphin from accidentally taking in any unwanted water. As far as how long a dolphin can hold its breath varies depending on the species. Some dolphins can only hold their breath for a few minutes (3 â 7 minutes) while underwater, while other species have been known to hold their breath for over 20 minutes during deep dives. Most of what is known about a dolphins ability to hold its breath is from observations of their dives.