Please capitalize where necessary: despite these achievements, however, poor air quality remains the number one environmental cause of premature deaths in the european union. the eu will be proposing a modified air quality package to ensure the best approach that will achieve results in this area.
A: Despite these achievements, however, poor air quality remains the number one environmental cause of premature deaths in the European Union. The EU will be proposing a modified Air Quality Package to ensure the best approach that will achieve results in this area.

Please capitalize where necessary: that's not how it is anymore though
A: That's not how it is anymore though

Please capitalize where necessary: dubai, thailand, israel, caribbean and u.s.:1 hour before departure
A: Dubai, Thailand, Israel, Caribbean and U.S.:1 hour before departure

Please capitalize where necessary: it was discovered that the ssl/tls plugins failed to validate the basic constraints extension in intermediate ca certificates.
A:
It was discovered that the SSL/TLS plugins failed to validate the basic constraints extension in intermediate CA certificates.