Spreektempo
https://www.ted.com/talks/david_katz_the_surprising_solution_to_ocean_plastic
Zonder geluid: lichaamstaal
https://www.ted.com/talks/van_jones_the_economic_injustice_of_plastic
Oogcontact
https://www.ted.com/talks/charles_moore_seas_of_plastic
Lichaamstaal en stemgebruik
https://www.youtube.com/watch?v=ROW9F-c0kIQ