Caitriona Fisher outside her Victorian redbrick house in Ranelagh, which had an E1 energy rating before works began. Photograph: Nick Bradshaw

The whole area of energy efficiency in period houses is a touchy subject and the fact period homes are exempt from the Building Energy Rating (BER)(...)

Former mayor of Baltimore and governor of Maryland Martin O Malley, who is speaking at a number of engagements in Ireland today and tomorrow. Photograph: David Sleator

Irish-American politician Martin O’Malley, an expected contender for the Democratic party’s 2016 presidential nomination, has said he believes the Iri(...)

Tuskar Lighthouse: many of the technology and engineering challenges of wave, tidal and offshore wind are likely to have been overcome, and we will have offshore “farms” where energy is harvested from the seas around us

What will Ireland’s energy mix look like in 2050? How will we deal by then with the three issues that dominate energy supply today: cost; security of (...)

Looming danger?: a nuclear reactor dome rises over an English beach. Photograph: Jason Alden/Bloomberg

1 Pumped-storage hydro Six years ago a simple idea was proposed by a Dublin-based scientist, one that, on paper at least, would leave Ireland awash wi(...)

Sustainable Energy Authority of Ireland chief executive Brian Motherway: “much to gain” if Ireland could reduce the exposure of the State’s energy system to imported fossil fuels. Photograph: Eric Luke/The Irish Times.

A rise in the amount of fuel imported into Ireland last year has been attributed to “stockpiling” in advance of the introduction of a carbon tax and a(...)

OxyMem managing director Wayne Byrne

UCD spin out OxyMem has won the Sustainable Energy Authority of Ireland (SEAI) Innovation Award which recognises organisations that are implementing i(...)

Carolanne Henry, Vodafone Ireland (left) and Tina Roche, Irish Corporate Leaders on Climate Change,  present the “Unlocking Opportunities” report to Tánaiste Joan Burton. Photograph: Mark Maxwell

Vodafone Ireland is part of a new initiative aimed at making the vision of a sustainable, low-carbon society a reality. The Irish Corporate Leaders on(...)

We may not be Iceland or Sicily. We have no active volcanoes or regular seismic activity. But that does not mean we cannot exploit the geothermal p(...)

Inis Mór twins Macha and Surnaí Ó Maoldhia during an eco-tour of the island on Thursday. Photograph: Andrew Downes. 0:52

Twins Macha and Surnaí Ó Maoldhia know all about the cost of boiling a kettle, for when they plug it in they see how the “cents shoot up” on their hou(...)

Minister for Energy Pat Rabbitte: sustainable energy is “the next big opportunity for Irish enterprise”. Photograph: Dara Mac Donaill

Ireland must position itself as a centre of excellence for companies supplying Europe’s green energy market, estimated to be worth €155 billion by 20(...)