Remember when Mount Pinatubo erupted in '91? The ashes ruined crops and dried up rivers in a large region of Luzon, Philippines. This weekend my son hiked up to the volcano's crate and this is how it looks today. Beautiful! Vegetation is back. It is amazing how nature heals herself. But a volcano's eruption is part of nature unlike what happens in a nuclear plant malfunction. Do you know how long it will take for nature to heal from such a man made disaster?