The planet hasn't dealt with the problem. This is good news at the first order, but it's clear that this is one more way that human activity may be dramatically

The planet hasn't dealt with the problem. This is good news at the first order, but it's clear that this is one more way that human activity may be dramatically impacting ecosystems. No one knows how this might affect food chains or chemical conditions. Organisms higher up in the food web are unlikely to evolve at the same pace and we could lose a lot of biodiversity and complexity that took dozens of millions of years to emerge.