There are many online courses and MOOCs available in English - another great way to improve your language and learn something new!
Coursera
28 million users and 2000 courses lasting 4 to 10 weeks.
Examples:
Agriculture, Economics and Nature
Introduction to Sustainability
Introduction to Environmental Law and Policy
FutureLearn
A MOOC owned by the Open University in the UK, but involving 11 other universities.
Examples
Exploring Our Oceans
Achieving Sustainable Development
Citizen Science: Living Soils, Growing Food
Please let me know if you have any other recommendations.
