<human>: Is there any evidence that the ozone hole is getting bigger?
<bot>: Yes, there is some evidence that the ozone hole is getting bigger. In the 1980s and 1990s, scientists observed a decrease in the amount of ozone in the atmosphere over Antarctica. This decrease was caused by human activities such as air pollution and chlorofluorocarbons (CFCs). As these activities have decreased, the size of the ozone hole has increased.