With his speech in front of the United Nations today, Leonardo DiCaprio cemented his reputation as one of the world's highest-profile activists on climate change.

'You can make history ...or be vilified by it,' he dramatically told world leaders.

After marching with 400,000 others on the streets of New York this weekend to demand tough regulations to cut the amount of CO2 being pumped into the air, DiCaprio opened a UN climate change summit by urging the world to crack down on polluters and 'put a price tag on carbon emissions.'

But the 39-year-old Hollywood star's own jetset lifestyle reveals a double-standard on the issue of climate change.

In his speech to the UN, he said: 'This disaster has grown beyond the choices that individuals make.'

MailOnline can report that DiCaprio took at least 20 trips across the nation and around the world this year alone - including numerous flights from New York to Los Angeles and back, a ski vacation to the French Alps, another vacation to the French Riviera, flights to London and Tokoyo to promote his film Wolf of Wall Street, two trips to Miami and trip to Brazil to watch the World Cup.

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Jetset lifestyle: Leonardo DiCaprio is seen here getting off his private jet in Nice, France, in May - one of the nearly two dozen trips he took this year

Leader: DiCaprio has fashioned himself as one of the most high-profile climate change activists an today urged world leaders at the United Nations to cut global carbon admissions

Activist: DiCaprio participated in the 'People's Climate March' in New York this weekend, but refused to answer questions about how his own lifestyle impacts the environment

And those were just the trips where he was spotted in public.

Additionally, DiCaprio owns at least four homes: two apartments in New York and mansions in Hollywood and Palm Springs.

He also recently sold an estate in Malibu for $17million.

And this summer, he spent his World Cup vacation on the fifth largest yacht in the world, a 482-foot behemoth owned by Mansour bin Zayed Al Nahyan - a billionaire oil tycoon from the UAE.

A rep for DiCaprio declined to comment for this story.

DiCaprio has tried to stay green in other parts of his life. He owns a $4million apartment in an eco-friendly apartment building in Battery Park City.

He drives a Toyota Prius and a $100,000 Fisker electric sports car. He's been spotted riding a bike around New York.

In 2007, he produced and narrated the 11th Hour, a documentary about climate change and other threats to the planet.

He also represents several environmental charities and has thrown his star power behind Formula E, a new racing circuit that uses electric cars, instead of roaring gasoline-powered vehicles.

However, his jetsetting - both for business and pleasure - means that he he's producing a lot more CO2 than most people.

When PJTV reporter Michelle Fields confronted DiCaprio about his lifestyle, he refused to answer and Ms Fields was quickly pushed out of the way by a minder

Expensive toy: DiCaprio rented the Topaz, the fifth largest yacht in the world to sail around Brazil for his World Cup trip. It is owned by a UAE oil tycoon

DiCaprio, seen here in 2009, is known to fly in private jets on many of his trips

Despite flying around the world on private jets, DiCaprio has been spotted in New York - seen here in August - riding public Citi Bikes around town

Even if he flew on a commercial jet for all of flights, his carbon footprint so far in 2014 would be a minimum of 40million metric tons of CO2 spewed into the atmosphere, more than twice the average American output for an entire year.

That figure only takes into account his flights and assumes that he flew exclusively on commercial airlines . The A-list star is worth an estimated $220million, according to CelebrityNetWorth.com, and it is known to frequently charter private jets.

Carbon emissions for private jets vary, but by some accounts are more than 37 times higher than flying commercial.

DiCaprio was the biggest star at this weekend's 'People's Climate March,' which drew 400,000 environmental activists to the streets of New York.

Leo's Hollywood Hills compound includes two adjoining properties and a custom-built basketball court

Newest purchase: DiCaprio bought this six-bedroom mansion in Palm Springs, California, for $5.2million

New York digs: DiCaprio has owned a pad in the eco-friendly Riverhouse building (left) in Battery Park City since 2008, but recently snapped up and adjacent apartment for $8million. He also Forked over $10million to buy an apartment in the health-minded Delos building on Greenwich Village (right)

On Tuesday, DiCaprio tweeted: 'Ran into this #climatechange pioneer at the @unitednations this morning. Thank you Vice President Gore.'

He told a reporter from conservative PJTV media: 'We want to create 100percent clean energy, we need to make a transition in this country and we need to show leadership.

'And that's what we're doing.'

However, when the reporter asked him about how his jetset lifestyle impacts the environment, she was quickly shunted away from the Wolf of Wall Street star by a minder.

Today, he addressed the United Nations Climate Summit and told world leaders: 'My friends, this body - perhaps more than any other gathering in human history - now faces that difficult task.

'You can make history ...or be vilified by it.'

He urged them: 'We need to put a pricetag on carbon emissions, and eliminate government subsidies for coal, gas, and oil companies. We need to end the free ride that industrial polluters have been given in the name of a free-market economy, they don't deserve our tax dollars, they deserve our scrutiny.'