Text: the 'green economy' is still an emerging concept.

Correct capitalization: The 'green economy' is still an emerging concept.

Text: try to get at least one hour of exercise daily.

Correct capitalization: Try to get at least one hour of exercise daily.

Text: - if the rider did not care for the horse, he will never be a real rider.

Correct capitalization: - If the rider did not care for the horse, he will never be a real rider.

Text: since we were very close on this year, was croatia / venice trip posted discarded and the garda.

Correct capitalization:
Since we were very close on this year, was Croatia / Venice Trip posted discarded and the Garda.