"If we don't reduce the impact of greenhouse gas emissions on climate change, ecodiversity will be lost. If ecodiversity is lost, then life on our planet will be endangered. Thus, if we don't reduce the impact of greenhouse gas emissions on climate change, then life on our planet will be endangered" is
◦ modus ponens
◦ modus tollens
◦ contraposition
◦ disjunctive syllogism
◦ hypothetical syllogism