Warren Buffett's bottom-up strategy doesn't allow him to be affected by things like the Russia-Ukraine conflict. He is focused on owning businesses that will survive spats such as these. Which is why his most recent letter highlighted Berkshire Hathaway's (BRK.B -0.43%) ownership of BNSF Railway company. He is extremely bullish on the long-term prospects; so much so that he has boosted planned capital expenditures to a company record $5 billion for BNSF this year. Most might be wondering if the TransCanada (TRP) Keystone XL pipeline worries him at all. Well, it simply doesn't. He believes there will be plenty of oil for everyone. For more, check out the short video clip below.

What else can we learn from the Oracle of Omaha?

Warren Buffett has made billions through his investing and he wants you to be able to invest like him. Through the years, Buffett has offered up investing tips to shareholders of Berkshire Hathaway. Now you can tap into the best of Warren Buffett's wisdom in a new special report from The Motley Fool. Click here now for a free copy of this invaluable report.

This segment is from Tuesday's edition of "Digging for Value," in which sector analysts Joel South and Taylor Muckerman discuss energy and materials news with host Alison Southwick. The twice-weekly show can be viewed on Tuesdays and Thursdays. It can also be found on Twitter, along with our extended coverage of the energy & materials sectors @TMFEnergy.