2012年，旧国标《环境空气质量标准》（GB 3095—2012）修订发布，首次纳入PM2.5限值，堪称中国大气污染治理的里程碑之一。李天威称，在生态环境领域2400多项环境标准中，《环境空气质量标准》是其中唯一经过国务院常务会议部署修订发布的。
But during the 1990s, the midlist disappeared at major publishing houses. I only survived because my third book sold hundreds of thousands of copies. But even I struggled in this new environment. I now had to spend months writing book proposals and pitching projects to editors.
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