Attention at all passengers. You can now book your train tickets on Uber and get 10% back in Uber credits to spend on your next train journey.

So no excuses not to visit your in-laws this Christmas.

Trains now on Uber. T's and C's apply check the Uber app. Hello, I'm Simon Long, Finance and Economics Editor, and this is Money Talks.

Later in the programme, Clean Energy's dirty secret.

These subsidies now are not just supporting renewable energy.

They're also being used to support fossil fuel energy as well.

Professor Diane Elson, a pioneer of gender budgeting, explains her work.

They thought the governments were gender neutral, but in fact the budgets were gender blind.

And Brazil moves at last to tackle its pensions crisis.

The public system for private sector workers

notched up a deficit of about $50 billion.

But to start, we tend to look on renewable energy as almost unambiguously a good thing.

We may grumble at the way wind turbines disfigure the landscape and endanger birds, or regret that we don't live somewhere sunny

enough to get all our electricity from solar panels.

But we welcome the reduction in global carbon emissions and that renewables are getting cheaper. But our cover story in this week's economists

suggests that the rise of renewables

is putting the global electricity market

into something of a crisis.

Its author, Henry Trix, our Energy and Commodities Editor, joins me now.

Let's start with cost, Henry.

It is getting cheaper, but who's benefiting?

It certainly is getting cheaper in the course of the last year or so.

...