global problem
any global social, economic, political or environmental problem that has already arisen or can arise from global change or globalization
ozone depletion
stratospheric phenomena of Earth
global risk
hypothetical future event on the Earth with adverse impact on a global scale
climate change
change in the statistical distribution of weather patterns for an extended period, not necessarily current or recent. Alternatively, rapid change in the Earth's gasocrine signaling homeostasis due to man-made gasocrine processes.