Carl Sagan testifying before Congress in 1985 on climate change

Why HN readers recommended it

HN commenters use it as proof that the climate problem was clearly explained decades ago, and as a model of clear communication to a broad audience.

This is a summary from the source dataset, not an endorsement by Hacker News or the video creator.

Video & recommendation details

Creator / channel

carlsagandotcom

Topic

climate change

Format

talk

Level

general

HN recommenders in dataset

4

HN mentions in dataset

20

Recommendation years in dataset

2021–2026

These counts and years describe the included Hacker News records; they are not YouTube views or the video’s publication date.

From the original HN conversations

Excerpts from the recorded comments. Follow each source for the full comment and surrounding discussion.

• The address Carl Sagan made in 1985 is well worth watching for those who remember those times and especially for those who weren't alive back then [0] People knew about this before you were born and decided their best interests were more important and they …

• Look at how many details this guy (Carl Sagan) conveyed in his 15' speech: [VIDEO] in a way that potentially everyone understood. I wonder if every explanation was like his, if nuance wouldn't be well communicated, even to large groups.

• A quick google search gives us plenty of past published projections and how they fared: [LINK] You can also watch Carl Sagan break it down in front of congress back in 1985 for just 15 minutes of your time [VIDEO]