In the 21st century, the Earth’s oceans are growing warmer and more acidic. This change is happening slowly over the long-term, but it can also cause short-term, local spikes. In the 21st century, the Earth’s oceans are growing warmer and more acidic. This change is happening slowly over the long-term, but it can also cause short-term, local spikes. Earth Sciences Environment Phys.org – latest science and technology news stories