Many levels of government collect, publish, and disseminate an extensive amount of information and statistics on a wide range of topics.
One way to specifically look for government information, including from federal and state agencies, is to use Google and search: site:.gov [topic keywords]. For example: site:.gov statistics e-cigarettes. Include a specific state if that's relevant.
Some examples of government information sites:
Climate change
Vaping
Congress, through committees in the House and Senate, investigates many topics of public interest. Committee hearings offer testimony from experts, involved parties, and others as well as reporting Q&A between witnesses and committee members.
For ExxonMobil case study:
For Juul case study: