See photos from the second day of Prince William and Kate’s visit to Boston

Princess Kate posed for a photo with those in the crowd as the royal couple greet the crowd outside Roca in Chelsea.David L. Ryan/Globe Staff

Prince William and Kate are kicking off their second day in Boston with visits to local communities and leaders in the Greater Boston area, where they will learn about community outreach and efforts made to combat climate change.

Drawing a crowd of hundreds from the Greater Boston area, the prince and princess spent the morning visiting Somerville’s Greentown Labs, the largest clean-tech incubator in North America, as well as a hub for all things “climatech.”

“Great meeting some of the companies supported here and seeing some familiar Earthshot faces,” tweeted the royal couple.

They then headed to Roca, a nonprofit in Chelsea that focuses on outreach to high-risk youth.

William and Kate arrived Wednesday afternoon for a three-day visit leading up to the Earthshot Prize event on Friday, which will be the first one ever hosted in the US. The couple was greeted with an enthusiastic — and soaking wet — crowd at City Hall in their first public event and later attended the Celtics game with Mayor Michelle Wu and Governor-elect Maura Healey.

See photos from the Prince and Princess of Wales’s second day in Boston:

Prince William and Princess Kate walked with Mayor Michelle Wu and Rev. Mariama White-Hammond, chief of Environment, Energy and Open Space for the City of Boston, at Boston Harbor Defenses Engagement in East Boston to see the changing face of Boston's shoreline as the city contends with rising sea levels. David L. Ryan/Globe Staff

Onlookers took cellphone photos of the motorcade of Britain's Prince William and Kate, Princess of Wales, in Boston.Boston Globe/Associated Press

Members of the media scrambled for position at Piers Park.Mary Schwalm/Associated Press

Britain's Prince William and Kate, Princess of Wales, visited the Harbor Defenses of Boston in Boston.BRIAN SNYDER/Associated Press

Prince William and Princess Kate met with the crowd outside Roca in Chelsea. David L. Ryan/Globe Staff

Catherine, Princess of Wales greeted the crowd in Chelsea on Thursday.Pool/Getty

The crowd greets the royals in Chelsea.David L. Ryan/Globe Staff

Prince William greeted people outside Roca, a non-profit organization focusing on high-risk young people in Chelsea.Pool/Getty

Britain's Prince William and Kate, Princess of Wales, left, chatted with participants of the Young Mother's Program at Roca in Chelsea.Reba Saldanha/Associated Press

Britain's Prince William and Kate, Princess of Wales were celebrated as they leave Roca in Chelsea.Reba Saldanha/Associated Press

Britain's Prince William listened to Jonathan Williams, a participant of Roca's Young Men's Program.Reba Saldanha/Associated Press

Henry Dynov-Teixeria, 8, of Somerville, presented flowers to Britain's Prince William and Kate, Princess of Wales, as his parents Melissa ( left) and Irene, look on following a visit to Greentown Labs on Thursday in Somerville.Mary Schwalm/Associated Press

Britain's Prince William and Kate, Princess of Wales toured the Greentown Labs for a view of green technologies developed in Somerville.164026+0000/Associated Press

Britain's Prince William and Kate, Princess of Wales spoke with startup companies that work at Greentown Labs as they toured the location for a view of green technologies developed in Somerville.ANGELA WEISS/AFP via Getty Images

Henry Dynov-Teixeira, 8, of Somerville, presented flowers to Britain's Prince William and Kate, Princess of Wales.ANGELA WEISS/Associated Press

Henry Dynov-Teixeira, 8, wore a King’s Guard costume while holding flowers as he awaited the arrival of Britain's Prince William and Kate, Princess of Wales to tour Greentown Labs in Somerville.CJ Gunther/Pool/Associated Press

Britain's Prince William and Kate, Princess of Wales spoke with startup companies that work at Greentown Labs as they toured the location.CJ Gunther/Pool/Associated Press

Britain's Prince William and Kate, Princess of Wales at Greentown Labs as they toured the location.ANGELA WEISS/Associated Press

Britain's Prince William, Prince of Wales, and Catherine, Princess of Wales smelled soap during a visit to the Greentown Labs.Pool/Getty

Britain's Prince William and Kate, Princess of Wales, left a visit to Greentown Labs.Mary Schwalm/Associated Press

Britain's Prince William and Kate, Princess of Wales waved to onlookers following a visit to Greentown Labs on Thursday in Somerville.Mary Schwalm/Associated Press