In addition to the databases that we recommend for use in your informative speeches, the following controversial topics databases may be useful for your persuasive speeches.
This multidisciplinary database collects statistical information, both qualitative and quantitative, on more than 80,000 topics from more than 18,000 sources such as market research reports, scientific journals, and government databases. Includes more than 15,000 studies, industry reports, dossiers, and infographics, plus forecasts on over 500 industries and 40 economies over a period of five years. All information is prepared and checked by a research team of more than 80 analysts.
These websites list a number of helpful links for topic selection and pro/con perspectives:
Refer to these sites for demographic research, public opinion polling, original reports and other data-driven research that might support your topic: