15. which of the following do scientists think is responsible for climate change?
nitrogen
smog
acid rain
carbon dioxide.
16. the goals of biodiversity conservation include all of the following except.
protecting individual species.
introducing exotic species into new environments.
preserving habitats and ecosystems.
making sure local people benefit from conservation efforts.
17. humans can cause an ecosystem to collapse by
collecting and chemically altering industrial waste to detoxify it.
reducing habitat fragmentation.
hunting a keystone species to extinction.
building shelter belts next to farm fields.