A critical system of Atlantic Ocean currents may be approaching collapse, which scientists warn will have a dangerous impact on our global climate. The Atlantic meridional overturning circulation (AMOC), which “effectively transports heat and salt through the global ocean,” has recently shown signs of trending toward a crucial “tipping point” according to a study published Friday in the journal Science Advances. Scientists have been warning of the potential collapse for decades, as the currents’ strength has been weakened by rising temperatures which affect the system’s balance of heat and sal…