Staying below 1.5°C will require urgent, deep and radical changes in almost every aspect of our lives.
Limiting human-induced warming will be tough, given where we start from.
Phasing out greenhouse gas emissions entirely by mid-century is possible, and promising trends are emerging. But the next five to ten years will be the real test of whether we can make that happen.
1.5 or 2 degrees? What matters is how we get there.