Climate change is not just an environmental issue.

气候变化不只是环境问题。

Global warming has become a hot environmental issue.

全球变暖成为当今热门环保问题。

Global warming is an international environmental issue.

全球变暖是国际性的环境问题。

Plastic bag tax may bring about other environmental issue.

征收胶袋税会带出其他环境问题。

The paper has a lot meaning from history to environmental issue.

从历史到环境的诸多因素考虑，纸张含义颇多。