Appearing before the United Kingdom parliament's business, energy and industrial strategy committee on how to tackle the climate emergency, the celebrated broadcaster and natural historian was asked about claims people were overreacting to the threat of a climate emergency.
He first visited the Australian landmark in the 1950s, describing it as a "multitude of fantastic, handsome forms of life".
Sir David said that between 30 and 40 per cent of all fish in the ocean depend on coral reefs at some point in their lives.
The veteran broadcaster said he was "sorry that there are people in power internationally" who were not interested in combating climate change.
The program claimed that if nothing is done to slow the rate of climate change, humans will also feel the effects soon enough and that people living in low-lying areas will be forced to move to higher ground.
When questioned about claims from climate change deniers that people were over-reacting, he singled out Australia and the U.S. as places where there were still skeptics in positions of power.
Introducing the program, Attenborough said he was alarmed at the rate climate change has progressed since he first began talking about the issue 20 years ago. He said he hoped the "electorate will actually respond" to public figures that promote climate science denial.
However, Sir David did not think the voice of criticism or disbelief should be "stamped on".
"It is very, very, important that the voices of dissent should have a place where they're heard and a place where the arguments between the two sides can be worked out in public and deterred and analysed in public".
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The economist and engineer served as deputy minister in a previous government. The financial crisis saw unemployment and poverty levels soar.
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"We can not be radical enough with dealing with these issues", he told politicians.
"The question is what is practically possible, how can we take the electorate with us in dealing with these things", he told a panel of MPs.
"Dealing with the problems means changing our lifestyles", he added.
He also asserted that a disregard of climate change policies has done no favours for securing a cleaner world and future for the youth of society.
"The most encouraging thing I see of course is that the electors of tomorrow are already making ... their voices very, very clear".
"[It is] also justification and reality that these people, young people, now are recognising their world is the future".
"The problem you're opening now is a very serious one".
Sir David said the issue of climate change was unlikely to affect him, but predicted "major problems" over the next 20 to 30 years.
Attenborough's address to British MPs included a silver lining of hope that the young people of today are trying their best to tackle the environmental crisis, however the naturalist also believes polluting could soon be looked back on with the same disgust as slavery.